*{
    margin:0;
    padding:0;
    list-style: none;
}
.banner img{
    width:100%;
}
.banner{
    margin-bottom: 80px;
}
.mainpic img{
    width:100%;
    margin:80px 0;
}
.guide{
    font-size: 20px;
    display: flex;
    justify-content: center;
    margin:40px;
}
.style{
    width:75%;
    margin:0 auto;
    display: flex;
    justify-content: space-between;
}
.style li{
    width:20%;
    padding:20px 0;
    background: #232323;
    color:#fff;
    text-align: center;
}
.style li a{
    color:#fff;
}